Open matter.—Matter widely leaded or containing numerous break-lines.
Off its feet.—When matter does not stand upright.
Out.—An omission marked in a proof by the reader.
Over-running.—Carrying words backward or forward in correcting.
Passing the making-up.—Passing to the next hand in order the lines remaining (if any) after a compositor has made up her matter, together with the gauge and proper folio.
Pie.—Type promiscuously intermingled.
Planing down.—To bring down types evenly on their feet, by laying a planer on the page and striking it firmly with a mallet.
Revise.—The last proof of a forme before working it off.
Riding.—Type at the end of a line catching against a lead, or the ends of leads over-lapping each other.
Runs on sorts.—Requiring an inordinate proportion of particular letters.